Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!well!shiva
From: shiva@well.sf.ca.us (Kenneth Porter)
Newsgroups: comp.os.os2.misc
Subject: Problem with DosReallocSeg() and multiple threads
Keywords: DosReallocSeg _beginthread malloc bug
Message-ID: <21987@well.sf.ca.us>
Date: 6 Dec 90 07:07:54 GMT
Distribution: comp
Lines: 17


I'm running OS/2 1.2 on a Dell 386/20 and hitting a problem
with DosReallocSeg() and multi-threading.  If multiple threads
try to realloc a segment, DosReallocSeg returns a garbage error
code. I first found this while tracing through a _beginthread()
that never returned.  It was calling DosReallocSeg by way of
malloc when it was allocating the new thread's stack. A quick
test program which spawns two threads each of which realloc a
segment allocated by thread 1 will quickly demonstrate the bug.
The garbage error code returned is code-sensitive; ie. small
edits change the value returned.
 
Pending the arrival of 1.3, what can I do about this?  Has
anyone more information about this problem, what strokes it,
and how it can be fixed?
 
Ken (shiva@well.sf.ca.us)